李季;王文硕;强旭博;

• 1:西安科技大学能源学院
• 2:西安科技大学西部矿井开采及灾害防治教育部重点实验室

摘要(Abstract)：

以与围岩剪切破坏密切相关的主应力差为研究切入点,利用理论计算及数值模拟等研究方法,以赵固二矿11030运输巷沿空掘巷为工程背景,研究了深部回采工作面侧向采动应力场主应力差分布特征和不同煤柱宽度下沿空掘巷围岩主应力差分布规律,并提出了以主应力差分布规律为依据的深部沿空掘巷煤柱设计思路。研究结果发现:11030运输巷沿空掘巷前围岩可以分为主应力差降低区、主应力差升高区和主应力差稳定区;不同煤柱宽度下,深部沿空掘巷顶板、底板和煤壁帮围岩的主应力差呈单峰值曲线分布;而煤柱帮围岩主应力差,在煤柱宽度≤8 m时,主应力差呈单峰值曲线分布;而当煤柱宽度>8 m时,主应力差呈双峰值曲线分布,且位于浅部围岩的峰值点大小明显小于位于围岩深部围岩的峰值点大小。在此基础之上,结合理论计算确定了11030运输巷沿空掘巷合理煤柱宽度应为8 m,并进行了现场工业性试验。

关键词(KeyWords)： 主应力差;煤柱宽度;数值模拟;沿空掘巷;深部巷道

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51804243)

作者(Author): 李季;王文硕;强旭博;

Email:

DOI: 10.13800/j.cnki.xakjdxxb.2020.0516

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